A "Sebberman" (sɪˈbæəmæn) is a person who overperforms in every match, regardless if it's a normal game or not (low-elo players would call it "tryharding") and behaves weirdly cringe when he loses
lane (rare occasion) or misses one up to several cannon
minions. The frustration is shown by repetitive use of the all
chat function to downgrade the opponent with phrases about elo,
cs or amount of ranked games in a current season.
A Sebberman can also be someone who's obsessed with collecting achievements for example mastery levels, rewards or free
loot. For a Sebberman friendship doesn't exist when it comes to competetive gaming
Example 1.
Man: *lost a cannon minion and behaves very cringe*
Woman: "
Don't be such a sebberman"
Example 2.
You overperform in almost every match, play every game like a chicken and you
don't allow any type of fun
Example
3.
You are hardstuck master because you're too afraid to lose more than one game